The utility model discloses a detection device of
battery tester. The detection device includes analog electric core,
capacitor and
resistor. Analog electric core includes electric core body, positive pole lug and negative pole lug, and positive pole lug and negative pole lug are connected with electric core body, and positive pole lug is used for the electric connection
battery tester's positive pole, and negative pole lug is used for the electric connection
battery tester's negative pole.
Capacitor is connected in series with positive pole lug and negative pole lug respectively.
Resistor is connected in parallel with
capacitor, and
resistor is connected in series with positive pole lug and negative pole lug respectively. In the detection device,
capacitor and
resistor parallel circuit can simulate electric core
equivalent circuit. When testing, the electric core
equivalent circuit before battery
liquid injection can be regarded as the parallel circuit of capacitor and resistor. According to the
capacitance of capacitor, the resistance of resistor and test
voltage, the size of leakage current can be calculated and controlled, so that whether the battery tester can detect the electric core micro
short circuit defect under the limit condition is detected, and the reliability of battery tester is ensured.